Finding the Fourth Proportional to 72.74, 108.50 and 65.05

Step by Step Solution

1. Step 1: Write the proportion equation
   72.74 : 108.50 = 65.05 : x
2. Step 2: Convert to fraction form
   72.74/108.50 = 65.05/x
3. Step 3: Cross multiply
   72.74x = 108.50 × 65.05
4. Step 4: Simplify right side
   72.74x = 7,057.71
5. Step 5: Solve for x
   x = 7,057.71/72.74
6. Step 6: Final answer
   x = 97.03